The application of metal-oxide surge arresters to safeguard electric power equipment against the hazards of abnormally high voltage surges of various origins is covered. Step-by step directions toward proper solutions of various applications are provided. In many cases, the prescribed steps are adequate. More complex and special solutions requiring study by experienced engineers are described, but specific solutions are not always given. The procedures are based on theoretical studies, test results, and experience.

This guide covers the application of metal-oxide surge arresters [see IEEE Standard for Metal-Oxide Surge Arresters for AC Power Circuits (>1 kV) C62.11-2012] to safeguard electric power equipment against the hazards of abnormally high voltage surges of various origins. This application guide does not cover the application of low-voltage surge protective devices below 1000 V alternating current (ac), except when applied to the secondary of a transformer.

The application of gapped silicon-carbide surge arresters to safeguard electric power equipment against the hazards of abnormally high voltage surges of various origins is addressed. General considerations with respect to overvoltages, valve arresters, protective levels, insulation-withstand, separation effects, and insulation coordination are discussed. Procedures for the protection of stations and distribution systems are provided.

The application of metal-oxide surge arresters to safeguard electric power equipment against the hazards of abnormally high voltage surges of various origins is covered. Step-by- step directions toward proper solutions of various applications are provided. In many cases, the prescribed steps are adequate. More complex and special solutions requiring study by experi- enced engineers are described, but specific solutions are not always given. The procedures are based on theoretical studies, test results, and experience.

This guide covers the application of metal-oxide surge arresters to safeguard electric power equipment, with a nominal operating voltage 1000 V and above, against the hazards of abnormally high voltage surges of various origins. This guide provides information on the characteristics of metal-oxide surge arresters, and the protection of substation equipment, distribution systems, overhead lines, and large electrical machines.